What type of inheritance governs the Fawn mutation in Zebra Finches?
Answer
Sex-linked recessive
The Fawn mutation, which represents a dilution of color where gray or black plumage appears as shades of light brown or dark brown, follows a specific genetic pattern. This mutation is classified as sex-linked recessive. This mode of inheritance means the gene responsible is carried on a sex chromosome, and for a bird to fully express the fawn coloration, it must inherit the recessive allele from its parents according to those sex-linked rules. This dilution effect lessens the visual contrast of markings, which can sometimes make these birds less favored by show breeders seeking sharp definition compared to standard types.
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